package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.*;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrEntityVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Autowired
    private AttrAttrgroupRelationDao relationDao;

    @Autowired
    private CategoryDao categoryDao;

    @Autowired
    private AttrGroupDao attrGroupDao;

    @Autowired
    private CategoryService categoryService;


    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }


    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        //1、根据分组id获取所有关联关系
        List<AttrAttrgroupRelationEntity> relations = relationDao.selectList(
                new QueryWrapper<AttrAttrgroupRelationEntity>()
                        .eq("attr_group_id", attrgroupId));
        //2、收集到所有属性id集合
        List<Long> attrIds = relations.stream().map((relation) -> {
            return relation.getAttrId();
        }).collect(Collectors.toList());

        if(attrIds == null || attrIds.size() == 0){
            return null;
        }
        //3、查询所有属性，并返回
        List<AttrEntity> attrEntities = this.listByIds(attrIds);
        return attrEntities;
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void saveAttr(AttrEntityVo attr) {

        //1、保存规格参数
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.save(attrEntity);

        //2、保存关联信息
        if(attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()
                && attr.getAttrGroupId()!=null){
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String attrType) {
        //判断attrType的值是base还是sale
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
                .eq("attr_type",attrType.equals("base")? ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode():ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());


        if (catelogId != 0) {
            queryWrapper.eq("catelog_id", catelogId);
        }
        String key = (String) params.get("key");
        if (StringUtils.isNotEmpty(key)) {
            queryWrapper.and((wrapper) -> {
                wrapper.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper
        );

        //处理关联值
        PageUtils pageUtils = new PageUtils(page);
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity, attrRespVo);

            //设置分类和所属组名称
            AttrAttrgroupRelationEntity attrId = relationDao.selectOne(
                    new QueryWrapper<AttrAttrgroupRelationEntity>()
                            .eq("attr_id", attrEntity.getAttrId()));

            if (attrId != null && attrId.getAttrGroupId() != null) {
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrId.getAttrGroupId());
                attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
            }

            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }

            return attrRespVo;
        }).collect(Collectors.toList());

        pageUtils.setList(respVos);

        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity, attrRespVo);


        if(attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
            //1、设置分组信息
            AttrAttrgroupRelationEntity attrgroupRelation = relationDao.selectOne(
                    new QueryWrapper<AttrAttrgroupRelationEntity>()
                            .eq("attr_id", attrId));

            if(attrgroupRelation!=null){
                //分组ID
                attrRespVo.setAttrGroupId(attrgroupRelation.getAttrGroupId());
                //分组名称
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupRelation.getAttrGroupId());
                if(attrGroupEntity!=null){
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }

        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = categoryService.findCatelogPath(catelogId);
        attrRespVo.setCatelogPath(catelogPath);

        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if (categoryEntity != null) {
            attrRespVo.setCatelogName(categoryEntity.getName());
        }

        return attrRespVo;
    }

    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params,Long attrgroupId) {

        //1、当前分组只能关联自己所属的分类里面的所有属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();
        //2、当前分组只能关联别的分组没有引用的属性
        //2.1)、当前分类下的其他分组
        List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
        List<Long> collect = group.stream().map(item -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());

        //2.2)、这些分组关联的属性
        List<AttrAttrgroupRelationEntity> groupId = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", collect));
        List<Long> attrIds = groupId.stream().map(item -> {
            return item.getAttrId();
        }).collect(Collectors.toList());

        //2.3)、从当前分类的所有属性中移除这些属性；
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type",ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
        if(attrIds!=null && attrIds.size()>0){
            wrapper.notIn("attr_id", attrIds);
        }
        String key = (String) params.get("key");
        if(!StringUtils.isEmpty(key)){
            wrapper.and((w)->{
                w.eq("attr_id",key).or().like("attr_name",key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);

        PageUtils pageUtils = new PageUtils(page);

        return pageUtils;
    }

}